What we’re about
For inquiries (speakers, sponsors, co-organisers), contact us via the HelPy Discord. See also: https://pydata-helsinki.github.io/
This meetup is for those who work or aspire to work in fields like machine learning, data engineering, MLOps, visualization, and statistical modeling. We share real-world experiences about solving problems in these fields using open-source tools, including but not limited to Python and its libraries – users of R, Julia or other languages are welcome.
We welcome speakers to talk about these tools and experiences using them, regardless of the level (beginner, intermediate, advanced are welcome). The usual talk is about half an hour long, but lightning talks of 5–10 minutes are great too! Occasionally we will include a debate! Come with a thought-provoking question or a hot take, and we'll set up a discussion where everyone can take part.
Please follow the PyData Code of Conduct.
Upcoming events
1
PyData Helsinki meetup with Cactos
Sofia Helsinki, Sofiankatu 4 C, Helsinki, FIWe’re generating more and more energy with renewables, which is great... but where does the energy go from there? One answer is "build lots of batteries," but that’s only part of the story. Smart energy storage means predicting consumption patterns, optimising when batteries charge and discharge, and balancing cost with reliability.
Join us on Tuesday, 11 November 2025, for an evening hosted and sponsored by Cactos, a company turning battery energy storage into a smart, data-driven system. We'll meet at Sofia Helsinki for technical talks by Cactos and others, plus snacks, drinks, and good company. Attendance is free but seats are limited: register soon!
Confirmed talks
Olli Ruokojoki: Data-Driven Batteries: Modeling State of Charge and Health from Operational Data
Tuomas Sivula: Stochastic Models in Energy Storage Operating Environments
Quentin Salomé: ⚡️ lightning talk (title TBA)
Osvaldo Martin: ⚡️ ArviZ 1.0: Refactoring for flexibility, extensibility, and power
Jouni Seppänen: Python Visualisation Tools
Schedule
17:30 doors open
18:00 Introductions
18:15 Talks
19:00 Food and mingling
19:45 🔮 PyData Helsinki Quiz
19:55 ⚡️Lightning talks
20:15 Talk
20.30 End of event, continue at a pub 🍻71 attendees
Past events
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